Add a 5-step setup wizard that replaces the single-step /setup:
1. Create Operator - create initial operator account
2. System Settings - configure map tile URL and attribution
3. API Keys - optionally add API keys for adapters
4. Configure Adapters - enable/disable adapters with region picker
5. Finish Setup - review and complete setup
Key changes:
- Update middleware to handle wizard URL structure and step routing
- Add wizard routes for each step with proper auth checks
- Create new templates using base_wizard.html for consistent styling
- Add audit events for system.update and setup.complete
- Update tests for new middleware behavior
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
